DOMINIC LAGAN FINALLY SOLVES THE TWO HUNDRED YEAR MYSTERY OF WHETHER MARIE ANTOINETTE'S SON LOUIS XVII, THE BOY KING OF FRANCE, REALLY ESCAPED FROM THE FORBIDDING TEMPLE PRISON IN REVOLUTIONARY PARIS, OR WHETHER HE DIED IN MISERY AS ROBESPIERRE HAD PLANNED. AND WHAT EXACTLY WAS THE ROLE OF THE ARISTOCRATIC SECRET AGENT SENT BY THE BRITISH ADMIRALTY, THE LEGENDARY MARQUIS OF BORN?